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(No Model.)

G. G. PYLE.

ELECTRIC ARC LAMP.

Patented Nov. 10, 1885.

I JNVENTOR :21;

WI T JV ESSES .dttorneyJT Nv PETERS. F'ho UNITED STATES PATENT OEEicE.

GEORGE O. PYLE, OF CUYAHOGA FALLS, OHIO, ASSIGNOE TO THE AMERICAN ELECTRIC HEADLIGHT COMPANY, OF INDIANAPOLIS, INDIANA.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 329,948, dated November 10, 1885.

Application filed December 4,1884. Serial No. 149,436. (No model.)

To all whom it may concern:

Be it known that I, GEORGE C. PYLE, of Cuyahoga Falls, in the county of Summit and State of Ohio, haveinvented certain new and useful Improvements in Electric-Arc Lamps; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and

to the figures and letters of reference marked thereon.

My present invention relates to certain improvements in the construction and composition of the carbon carrying and actuating mechanism adapted to effect the simultaneous movements of the carbons; and it consists in the several novel and useful combinations and arrangements of parts, as hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a rear View, Fig. 2 a side View, and Fig. 3 a top View, of a carbon carrying and actuating mechanism embodying my invention. Fig. 4 is a section on line 00 x of Fig. 2. Figs. 5 and 2 6 represent details of construction. Fig. 7 illustrates a modification of the gripping mechanism. Figs. 8 and 9 illustrate modified forms of the feed-driving roller.

Similar letters of reference in the several figures indicate the same parts.

In the lamp shown by way of illustration, A is a standard or supporting-frame adapted to be mounted upon the sliding board of a headlight or otherwise properly placed in proximity to areflector, B, the lamp being of the kind known as a focusing-lamp, wherein both carbons are fed proportionally in order to maintain the are at a given point. The standard A is preferably so constructed as to pro- 0 ject over or above the reflector, in order that the carrying devices for the upper carbon may be firmly supported near the line of feed.

The mechanism for actuating the upper carbon, applicable alike for feeding the upper 5 carbon only or in connection with devices for simultaneously effecting a proportionate feed of the lower carbon, consists, essentially, of a sliding plate or frame carrying a roller mounted in movable bearings and a pair of opposing or bearing rollers between which the carbon is conducted, an electro-magnet acting to first close the movable roller upon or against the carbon and thus grasp the latter, and to raise the sliding plate, its attached rollers, and the carbon held thereby, and an actuating 5 5 mechanism applied to drive one of the clamping-rollers, and thereby effect the feeding of the carbon.

As represented in the drawings, C indicates the sliding plate or frame carrying the bearing-rollers c 0, preferably mounted upon an arm or extension, C, and a lever, C pivoted, as at c, to the plate C, and carrying in its lower furcated end the roller 0 The rollers c c are grooved, as shown, to embrace the carbon, and the bearing-rollers c c are provided with a central groove or depression, 0, thus giving a double-bearing surface to each roller.

The movable roller 0 which is in this instance the driver, is made in the form of a worm-wheel, the teeth being formed in the grooved portion, though, as is obvious, they may be made on the edge of the roller, (see Fig. 8,) or added in the form of a separate wheel attached to the roller or its shaft. (See Fig. 9.) The lever C is formed or provided with an inclined or cam -shaped extremity, which makes contact with a pin, (1, fastened to an armature, D. This armature D faces the pole-pieces of an electro-magnet, D, being sustained and guided upon pins d, attached to the pole-pieces, and entering suitable openings in the armature.

The operation or action of the devices just described is as follows: When no current is passing through the coils of the electromagnet, the armature D falls and rests upon a projecting portion of the frame, as shown, and at the same time the plate C drops a sufficient distance to permit the pin (1 to relieve the pressure on the lever C and the carbon is thereby permitted to drop until its end makes contact with the lower carbon. The current, being now established in the circuit, energizes the core of the elect-ro-magnet and causes the 9 5 armature to be raised. The first movement of the armature causes the pin d to slide upward upon the inclined or cam-shaped extremity of the lever C thereby tilting said lever until its roller 0" takes afirm hold of the carbon, which is grasped between said roller and the bearing-rollers c 0, while the continued upward motion of the armature, acting through the said pin d and lever G operates to raise the plate 0, its rollers, and the carbon held thereby. It will thus be seen that when the carbon is elevated the rollers will be held pressed upon the carbon with a force proportionate to the weight of the sliding plate, its attached devices, and the carbon, and that the degree of pressure can be regulated by changing the pivotal point of attachment of the lever G on the plate 0.

The devices thus far described constitute an efficient mechanism for holding the carbon and forming the are; but in order to maintain the are it is necessary that one or both of the carbons should be fed forward in proportion as their points are consumed. In the present instance the feed of the upper carbon is effected by the rotation of one of the clampingrollers, which latter may be connected to and driven by any of the well-known automatic feeding mechanisms.

As before stated, one ofthe rollers, 0 is provided with teeth adapted to co-operate with a worm, E, secured to a shaft, E, sustained at one end in a block or bearing, 6, attached to the lever O, and at the other in a bearing formed in or attached to the bed-plate. The shaft E is connected to and driven by any suitable automatic feed actuating mechanism, and communicates motion to the carbon through the roller 0 which latter is, as has been explained, maintained in firm frictional contact with the surface of the carbon so long as the circuit is closed and the current passes through the electro-magnet.

In lieu of the pin d and incline on the end of lever G other well-known equivalent c011- trivances may be employed for actuating the movable roller when the armature is raised, such, for example, as a link, h, Fig. 7, pivoted to the end of the lever G and armature. Instead of mounting the bearing-rollers c 0 directly upon the sliding plate they may be supported on a lever, h, pivoted to said plate, and connected at its upper end to the armature by a link, If, as shown in Fig. 7.

The roller 0 is preferably adjusted to bear upon the carbon at a point intermediate the rollers c 0, whereby the carbon is prevented from tilting and the bite of the driving-roller is insured.

The bearing-surface of the rollers c c is divided into two sections by the central groove in order that the carbon may be more securely held and directed.

\Vith a roller clamping and feeding mechanism such as described the sticking of the clamp after the circuit is broken is avoided, as the fall of the armature releases the carbon at once and the rollers facilitate its descent. Moreover, clamping and driving mechanisms are consolidated, both functions being performed by the same device and applied directly to the carbon, thus dispensing with the usual carbon-holder.

As before stated, the devices for actuating the upper carbon can be employed to good advantage in connection with a fixed lower carbon, but as such a lamp is not well adapted for use in connection with a reflector, in that the position of the arc is constantly changing, I prefer to use it in combination with a mechanism for feeding the lower carbon in proportion to its rate of consumption, and to this end I have devised the arrangement illustrated, wherein the lower carbon is borne by a holder, E fastened to a plate or frame, E, adapted to slide vertically in ways in the main frame. The plate E is provided with a divided nut, whose two sections 0 0 are each pivoted, as at 6 to said plate, and provided with angular faces or shoulders 0, against which a flat spring, c is arranged to bear, to hold the sections c a open or closed. This nut is arranged to engage when closed the vertical screwshaft F, supported in suitable hearings on the main frame, said shaft being connected, as by the gears g g, to the shaft E, that actuates the feeding-roller of the uppercarbon clamp, whereby both carbons may be actuated and fed forward proportionally by the automatic feed-controlling mechanism.

As the mechanism described is complete in itself, and as any one skilled in the art could readily apply one of the well-known automatic feeding mechanisms for connnunicating the requisite motion to the shaft E, I have not deemed it necessary to illustrate the same.

Vhen the lamp is used in connection with a reflector, the main frame or standard is mounted upon the sliding board to one side of the reflector, as indicated in Figs. 1 and 2, the carbons being projected within the reflector, and the shaft E, which is of small diameter, passing through the openings in the reflector and in rear of the carbons.

If found desirable, and especially when long carbons are employed, any suitable form of guiding and supporting mechanism may be applied, as will be well understood.

1 claim as my invention- 1. In an electric-arc lamp and as a means for holding and guiding the carbon thereof, the grooved bearing-rollers and the movable gripping-roller mounted upon a sliding frame or plate and actuated to close the movable roller upon the carbon and elevate the latter by an electro-magnet whose armature is connected to the movable bearing of the grippingroller, substantially as described.

2. The combination, in an electric-arc lamp and as a means for sustaining, guiding, and elevating the carbon thereof, the grooved bearing-rollers mounted upon a sliding plate or frame, a movable support likewise borne by said sliding plate or frame and carrying a roller, and an electro-magnet whose armature is connected to the said movable support, whereby the roller is first caused to grasp the carbon, and by its contact therewith effect the elevation of the carbon, substantially as described.

3. In combination with the guiding and gripping rollers mounted upon a sliding plate ICC IIO

or frame, the movable support for one of said I for use in connection with the reflector of a rollers, and the armature connected thereto for pressing the roller against the carbon and raising the plate, substantially as described.

4. In an electric-arc lamp, the sliding plate carrying the bearing-rollers, and the lever with the incline and gripping-roller, in combination With the armature provided with a pin for engagement with the incline 011 the lever, substantially as and for the purpose set forth.

5. The combination, in a focusing electric lamp, of the movable plate, its bearing and gripping rollers, and mechanism, such as indicated, for actuating the gripping-roller to clamp and raise the upper carbon, the wormshaft applied to the gripping-roller and geared to the adjusting mechanism for actuating the lower carbon, substantially as described.

6. The sliding plate carrying the lower carbon, the pivoted sectional nut and its retaining-spring, in combination with the screwshaft, substantially as described.

7. In an electric lamp arranged and adapted head-light, and in combination with said reflector, the main frame or standard provided with the laterally-projecting or overhanging portion to sustain the mechanism for holding and feeding the upper carbon and provided with ways below the reflector to guide the lower carbon holder, substantially as described.

S. In combination with the movable plate or frame and the grooved bearing and pivotally-supported gripping-roller mounted upon said plate or frame, of the vertical worm-shaft supported at one end in a bearing attached to the lever carrying the gripping-roller and meshing with the wor1n-wheel applied to said movable gripping-roller, substantially as described.

GEO. G. PYLE.

Witnesses:

ARTHUR Hides, F. E. SOUTHMAYD. 

